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A magnetic field of 37.2 TT has been achieved at the MIT Francis Bitter National Magnetic...

A magnetic field of 37.2 TT has been achieved at the MIT Francis Bitter National Magnetic Laboratory. Find the current needed to achieve such a field

a)

2.2 cmcm from a long, straight wire

b)

at the center of a circular coil of radius 40 cmcm that has 100 turns

c)

near the center of a solenoid with radius 2.4 cmcm , length 32 cmcm , and 40,000 turns

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